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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhang, Shaojie Yang, Hongjuan Wei, Fangqiang Jiang, Yuhong Liu, Dunlong |
| Copyright Year | 2014 |
| Abstract | Debris flow forecast is an important means of disaster mitigation. However, the accuracy of the statistics-based debris flow forecast is unsatisfied while the mechanism-based forecast is unavailable at the watershed scale because most of existing researches on the initiation mechanism of debris flow took a single slope as the main object. In order to solve this problem, this paper developed a model of debris flow forecast based on the water-soil coupling mechanism at the watershed scale. In this model, the runoff and the instable soil caused by the rainfall in a watershed is estimated by the distributed hydrological model (GBHM) and an instable identification model of the unsaturated soil. Because the debris flow is a special fluid composed of soil and water and has a bigger density, the density estimated by the runoff and instable soil mass in a watershed under the action of a rainfall is employed as a key factor to identify the formation probability of debris flow in the forecast model. The Jiangjia Gulley, a typical debris flow valley with a several debris flow events each year, is selected as a case study watershed to test this forecast model of debris flow. According the observation data of Dongchuan Debris Flow Observation and Research Station, CAS located in Jiangjia Gulley, there were 4 debris flow events in 2006. The test results show that the accuracy of the model is satisfied. |
| Starting Page | 757 |
| Ending Page | 763 |
| Page Count | 7 |
| File Format | |
| ISSN | 1674487X |
| Journal | Journal of Earth Science |
| Volume Number | 25 |
| Issue Number | 4 |
| e-ISSN | 1867111X |
| Language | English |
| Publisher | China University of Geosciences |
| Publisher Date | 2014-07-26 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | debris flow forecast watershed scale soil-water coupling distributed hydrological model limit equilibrium analysis Jiangjia Gulley Earth Sciences Geotechnical Engineering & Applied Earth Sciences Biogeosciences Geochemistry Geology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Earth and Planetary Sciences |
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